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<!DOCTYPE html>

 <html>

 <head>

     <meta charset="utf-8"/>

     <title>JSCode demo</title>

     <link rel="stylesheet" type="text/css" href="/css/normalize.css">

     <style type="text/css">

         body {background: #000 url(index.png) no-repeat center 230px;}

         #div1 {position:relative; width:450px; height:450px; margin: 20px auto 0; }

         #div1 a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#fff; font-weight:bold; text-decoration:none; padding: 3px 6px; }

         #div1 a:hover {border: 1px solid #eee; background: #000; }

         #div1 .blue {color:blue;}

         #div1 .red {color:red;}

         #div1 .yellow {color:yellow;}

         

         p { font: 16px Microsoft YaHei; text-align: center; color: #ba0c0c; }

         p a { font-size: 14px; color: #ba0c0c; }

         p a:hover { color: red; }

     </style>

     <script type="text/javascript">

         var radius = 120;

         var dtr = Math.PI/180;

         var d=300;

         

         var mcList = [];

         var active = false;

         var lasta = 1;

         var lastb = 1;

         var distr = true;

         var tspeed=10;

         var size=250;

         

         var mouseX=0;

         var mouseY=0;

         

         var howElliptical=1;

         

         var aA=null;

         var oDiv=null;

         

         window.onload=function ()

         {

             var i=0;

             var oTag=null;

             

             oDiv=document.getElementById('div1');

             

             aA=oDiv.getElementsByTagName('a');

             

             for(i=0;i<aA.length;i++)

             {

                 oTag={};

                 

                 oTag.offsetWidth=aA[i].offsetWidth;

                 oTag.offsetHeight=aA[i].offsetHeight;

                 

                 mcList.push(oTag);

             }

             

             sineCosine( 0,0,0 );

             

             positionAll();

             

             oDiv.onmouseover=function ()

             {

                 active=true;

             };

             

             oDiv.onmouseout=function ()

             {

                 active=false;

             };

             

             oDiv.onmousemove=function (ev)

             {

                 var oEvent=window.event || ev;

                 

                 mouseX=oEvent.clientX-(oDiv.offsetLeft+oDiv.offsetWidth/2);

                 mouseY=oEvent.clientY-(oDiv.offsetTop+oDiv.offsetHeight/2);

                 

                 mouseX/=5;

                 mouseY/=5;

             };

             

             setInterval(update, 30);

         };

         

         function update()

         {

             var a;

             var b;

             

             if(active)

             {

                 a = (-Math.min( Math.max( -mouseY, -size ), size ) / radius ) * tspeed;

                 b = (Math.min( Math.max( -mouseX, -size ), size ) / radius ) * tspeed;

             }

             else

             {

                 a = lasta * 0.98;

                 b = lastb * 0.98;

             }

             

             lasta=a;

             lastb=b;

             

             if(Math.abs(a)<=0.01 && Math.abs(b)<=0.01)

             {

                 return;

             }

             

             var c=0;

             sineCosine(a,b,c);

             for(var j=0;j<mcList.length;j++)

             {

                 var rx1=mcList[j].cx;

                 var ry1=mcList[j].cy*ca+mcList[j].cz*(-sa);

                 var rz1=mcList[j].cy*sa+mcList[j].cz*ca;

                 

                 var rx2=rx1*cb+rz1*sb;

                 var ry2=ry1;

                 var rz2=rx1*(-sb)+rz1*cb;

                 

                 var rx3=rx2*cc+ry2*(-sc);

                 var ry3=rx2*sc+ry2*cc;

                 var rz3=rz2;

                 

                 mcList[j].cx=rx3;

                 mcList[j].cy=ry3;

                 mcList[j].cz=rz3;

                 

                 per=d/(d+rz3);

                 

                 mcList[j].x=(howElliptical*rx3*per)-(howElliptical*2);

                 mcList[j].y=ry3*per;

                 mcList[j].scale=per;

                 mcList[j].alpha=per;

                 

                 mcList[j].alpha=(mcList[j].alpha-0.6)*(10/6);

             }

             

             doPosition();

             depthSort();

         }

         

         function depthSort()

         {

             var i=0;

             var aTmp=[];

             

             for(i=0;i<aA.length;i++)

             {

                 aTmp.push(aA[i]);

             }

             

             aTmp.sort

             (

                 function (vItem1, vItem2)

                 {

                     if(vItem1.cz>vItem2.cz)

                     {

                         return -1;

                     }

                     else if(vItem1.cz<vItem2.cz)

                     {

                         return 1;

                     }

                     else

                     {

                         return 0;

                     }

                 }

             );

             

             for(i=0;i<aTmp.length;i++)

             {

                 aTmp[i].style.zIndex=i;

             }

         }

         

         function positionAll()

         {

             var phi=0;

             var theta=0;

             var max=mcList.length;

             var i=0;

             

             var aTmp=[];

             var oFragment=document.createDocumentFragment();

             

             //随机排序

             for(i=0;i<aA.length;i++)

             {

                 aTmp.push(aA[i]);

             }

             

             aTmp.sort

             (

                 function ()

                 {

                     return Math.random()<0.5?1:-1;

                 }

             );

             

             for(i=0;i<aTmp.length;i++)

             {

                 oFragment.appendChild(aTmp[i]);

             }

             

             oDiv.appendChild(oFragment);

             

             for( var i=1; i<max+1; i++){

                 if( distr )

                 {

                     phi = Math.acos(-1+(2*i-1)/max);

                     theta = Math.sqrt(max*Math.PI)*phi;

                 }

                 else

                 {

                     phi = Math.random()*(Math.PI);

                     theta = Math.random()*(2*Math.PI);

                 }

                 //坐标变换

                 mcList[i-1].cx = radius * Math.cos(theta)*Math.sin(phi);

                 mcList[i-1].cy = radius * Math.sin(theta)*Math.sin(phi);

                 mcList[i-1].cz = radius * Math.cos(phi);

                 

                 aA[i-1].style.left=mcList[i-1].cx+oDiv.offsetWidth/2-mcList[i-1].offsetWidth/2+'px';

                 aA[i-1].style.top=mcList[i-1].cy+oDiv.offsetHeight/2-mcList[i-1].offsetHeight/2+'px';

             }

         }

         

         function doPosition()

         {

             var l=oDiv.offsetWidth/2;

             var t=oDiv.offsetHeight/2;

             for(var i=0;i<mcList.length;i++)

             {

                 aA[i].style.left=mcList[i].cx+l-mcList[i].offsetWidth/2+'px';

                 aA[i].style.top=mcList[i].cy+t-mcList[i].offsetHeight/2+'px';

                 

                 aA[i].style.fontSize=Math.ceil(12*mcList[i].scale/2)+8+'px';

                 

                 aA[i].style.filter="alpha(opacity="+100*mcList[i].alpha+")";

                 aA[i].style.opacity=mcList[i].alpha;

             }

         }

         

         function sineCosine( a, b, c)

         {

             sa = Math.sin(a * dtr);

             ca = Math.cos(a * dtr);

             sb = Math.sin(b * dtr);

             cb = Math.cos(b * dtr);

             sc = Math.sin(c * dtr);

             cc = Math.cos(c * dtr);

         }

     </script>

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